Hydraulic motor.



L. A. LAURSEN.

HYDRAULIG MOTOR.

APPLIOATION FILED AUG. 26, 1911. 1,05 1,601. w Patented Jan. 28, 1913.

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W]TNESSES: [NVENTOR W. lauritir/ilwaem gzimf V I W Attorney:

COLUMBIA PLANOURAPH cO-. WASHINGTON, D. C.

L. A. LAURSEN.

HYDRAULIC MOTOR. APPLICATION FILED AUG. 26, 1911. 1,051,601 PatentedJan.28, 1913.

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WIT/V 5555 [NVENTOR Laurzjafllauraen gi l/mam B y I I I 4 v Af/omey cuuuuuuu A PLANOGRAI'H CO..WASHINUTON. D. c.

UNITED STATES PATENT OFFICE.

LAURITS A. LAURSEN, F HOLGOMBE. WISCONSIN.

HYDRAULIC MOTOR.

To (4/6 whom it may concern Be it known that I, LAURITS A. LAURSEN, acitizen of the United States, residing at Holcombe, in the county ofChippewa and State of Visconsin, have invented certain new and usefulImprovements in Hydraulic Motors, of which the following is aspecification.

The present invention embodies improvements in hydraulic motors of thesame general type as described in my United States Letters Patent No.995,263, issued to me June 13, 1911.

The present invention relates particularly to the valve mechanismcontrolling the admission and exhaust of a pressure medium to and from,respectively, a working cylinder in which operates a piston connectedwith suitable pumping means.

The invention involves the valve mechanism itself and the peculiarautomatic means for operating said valve mechanism, all of which willappear more fully hereinafter.

For a full understanding of the present invention, reference is to behad to the following description and to the accompany-' ing drawings, inwhich- Figure 1 is a side elevation of a hydraulic pump embodying theessential features of the invention, the valve chest being shown insection; Fig. 2 is a horizontal sectional view; Fig. 3 is a top planview; Fig. 4 is an end view looking toward the shifting lever.

Throughout the following detail description and on the several figuresof the drawings, similar parts are referred to by like referencecharacters.

In the drawings, A denotes a working cylinder in which operates theworking piston B, and C denotes a pumping cylinder in which is locatedthe piston D. The above parts are arranged substantially as shown in myprevious patent, the pistons B and D being connected by the rod 1 andthe piston B having a piston rod 2 which extends through an end of thecylinder A at the stuffing-box 3, and carries suitable means foroperating a shifting lever 4 by which the positions of the valves arecontrolled.

At its opposite ends, the cylinder A is in communication with the fluidpassages 5 and 6, said fluid passages being in turn in communicationwith a valve chest 7 such communication being established by open ngs 8and 9 which lead downwardly from the Specification of Letters Patent.

Application filed August 26, 1911.

Patented Jan. 28, 1913. Serial No. 646,201.

outer ends of the passages and 6 respec tively. At one end, the valvechest 7 has an exhaust port 10, and in the chest 7 is an inlet chamber11 having the fluid inlet port 12. The top of the chamber 11 hasopenings 13 and 14 in vertical alinement with the openings 8 and 9,respectively, and hollow or tubular valves 15 and 16 are arranged formovement in the valve chest, as will be more fully described. Each ofthe valves 15 and 16 has-a valve stem 17 which passes through a suitablestuffing-box to its point of connection with a link 18 pivotallyattached to one end of a rocker lever 19, the latter being pivotedbetween its ends to the vertical standard 20 suitably secured to asupporting part of the machine.

The valve stems 17 are preferably made in sections, the lowermostsection having a socket 21 receiving the lower end of the upper section,the latter being firmly attached by a suitable set screw 22.

As above mentioned, the rocker lever 19 is pivoted between its ends andis connected with one end of a rod 23, the opposite end of said rodbeing connected with an arm 2st supported by an adjustable bracket 25 onthe shifting lever 4. The bracket 25 is adapted to be adjustedlongitudinally of the lever 4 and said lever 4 is pivoted to thehorizontal arm 26, to which are attached the upper stop 27 and lowerstop 28.

On the piston rod 2 are arranged spaced trip arms 29 which may besupplied with suitable rollers 30, the latter being adapted for directcontact with the lower end portion of the shifting lever 4 and said triparms 29 being secured to the rod 2 by set screws or similar fastenings.The arms 29 may furthermore have bearings 31 receiving a guide rod 32projecting from the adjacent end of the cylinder A. At its upper end,the lever 4 carries a heavy weight 4 and adjustably mounted on therocker lever 19 is a counterbalance weight 33.

The construction of the invention being as above described, the generaloperation of the valve mechanism is as follows: Assuming that the partsare in the positions shown in Fig. 1, the fluid pressure medium entersthe inlet chamber 11 through the inlet 12 and passes from the inletchamber upwardly through the hollow portion of the valve 15, and thepassage 5, into the cylinder A. The pressure of the fluid being exertedagainst the piston 13, the latter is forced toward the outer end of thecylinder A from its position shown in Fig. 2. As the piston B movesoutwardly in the aforesaid direction, the member 29 and its roller 30,by engagement with the lower end of the lever 4, tends to raise saidlever into a vertical position, the arm swinging on its pivot andpermitting the lever i to swing beyond the dead-center, whereupon thelever 4: cooperates with the rocker lever 19 to move the latter into aposition reversing the positions of the valves 15 and 16. During theabove movement of the piston 13, thefluid previously admitted into thecylinder A through the passage-6 exhausts through said passage andpasses therefrom through the opening 9 in the exhaust chamber 11 of thevalve chest 7 and out through the exhaust port 10. A pipe may, ofcourse, be connected with the exhaust port if desired, but is not shown.\Vhen the positions of the valves are reversed. the passage of the fluidfrom the inlet chamber 11 to the passage 5 is cut ofl by the valve 15,and said fluid then passes through the valve 16 and passage 6 to theopposite end of the cylinder A. The above one 'ation of course,continued indefinitely, the automatic operation of the pump beinginsured by supplying water at the inlet 12 under a suflicient head to dothe work required.

It will be understood. of course, that the pumping cylinder C will beconnected by pipes or other connections. not shown, to receive water andpump the latter to a suitable point of utilization.

Having thus described the invention, what is claimed as new is:

1. In a hydraulic motor. the combination of a working cylinder. a pistonreciprocable therein, a pair of passages opening into the cylinder atopposite ends thereof to deliver a fluid pressure medium to oppositesides of the cylinder, an inlet chamber having an opening for theentrance of the fluid pres: sure medium. a superposed exhaust chamberprovided with a suitable outlet opening, the top of the inlet chamberbeing formed with spaced openings establishing communication between theexhaust and inlet chambers, said exhaust chamber being provided withopenings arranged in alinement with the openings at the top of the inletchamber and wea e each communicating with one of said passages,reciprocating valves controlling said passages, a rocker lever connectedat its 0pposite ends to said valves, a counterbalance weight carried bysaid lever, a supporting bracket, a shifting lever pivoted between itsends to the outer portion of said bracket, stops projecting upwardly anddownwardly from the bracket to engage the upper and lower end portionsof the shifting lever respectively, according to the direction of itsmovement, a weight carried by the upper end of the shifting lever, anadjustable member supported by the shifting lever, a rod connected atone end to the rocker lever and loosely connected at its opposite end tosaid adjustable member, and means for actuating the shifting levercoacting at the lower end thereof.

2. In a hydraulic motor, the combination of a working cylinder, a pistonreciprocable therein, a pair of passages opening into the cylinder atopposite ends thereof to deliver a fluid pressure medium to the oppositesides of the cylinder, an inlet chamber having an opening for theentrance of the fluid pressure medium, an adjacent-1y disposed exhaustchamber provided with a suitable outlet opening, the top of the inletchamber being formed with spaced openings establishing communicationbetween the exhaust and inlet chambers, said exhaust chamber beingprovided with openings arranged in alinement with the openings at. thetop of the inlet chamber and each communicating with one of saidpassages, reciprocating valves controlling said passages, a leverconnected to said valves, a shifting lever, stops adapted to engage theends of the shifting lever. a weight carried by the upper end of theshifting lever, an adjustable member supported by the shifting lever,amember connected with said first named lever and having a .looseconnection with said adjustable mem- LAURITS A. LAURSEN.

Vitnesses E. A. GLEAVES, J. A. CLEAVES.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of latents, Washington, D, C.

